Quote:
you could also opt for a rounded groove done with a ball nose if you do not like the 'square' groove.
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I'm not sure if that would work. Basicly you need a flat area top and bottom for the O~ring to 'flatten out' into. I think the standard/formula would be different for a rounded channel :shrug: . I'd be easier to get a good clean smooth finish on the 'square' channel...